SPECT is particularly useful in diagnosing and managing several types of cancer, including: 1. Lung Cancer: SPECT can help differentiate between benign and malignant lung nodules. 2. Bone Cancer: It is used to detect bone metastases, which are common in cancers like breast, prostate, and lung cancer. 3. Brain Tumors: SPECT can help in differentiating between tumor recurrence and radiation necrosis. 4. Thyroid Cancer: It can evaluate the function of thyroid nodules and detect metastases.